Features of the Icebreaker Women's 260 Zone Long Sleeve Half Zip Top Updated design Lycra content for stretch and mobility Zoned body mapping Technology for optimal thermal regulation Zip neck collar for temperature regulation Strategically placed merino mesh for ventilation Flatlock seams prevent chafing Raglan sleeve construction for mobility Dropped front and back hem for added coverage Icebreaker heat transfer logo Fabric Details Solid: 260gm jersey, 97% Merino, 3% Lycra Mesh: 180gm eyelet, 99% Merino, 1% Lycra Insert: 230gm jersey waffle, 78% Merino, 22% Polyester